Good afternoon gentlemen, Vito Cdi

Someone could tell me that I have to disarm to see the injectors of the Vito L CDI, it is 110, I am going to buy one and I would like to see that I do not have fogged injectors

The injectors on that Vito model are a bit of a gamble. I wouldn't worry about them, because even if they're fine, they could fail in three months.
It's a very popular model, and I'm sure they shouldn't be too expensive at junkyards, used car dealerships, or auto parts stores compared to other parts for that van.

Check the mileage on the engine and look for wear and tear on knobs, pedals, and switches that might indicate the mileage is accurate.
You can go to a Mercedes dealership and have them run a diagnostic scan; the internal memory doesn't lie.
Look for corrosion on the underside of the chassis and make sure the engine isn't leaking oil or fluids.

In Spain, if you try to buy a used car, they all have 75,000 kilometers, no matter how old they are, lol.

You remove the plastic housing and you see them. You take away the clicks that hold the excess tubes the current chips and some screws that take them to the cylinder head as a madman that will be stuck.